Rion Automatic Jalousie Opener, Model# HG1033

Use the Rion Automatic Jalousie Opener to control the temperature and ventilation in all Rion Greenhouses. As the air inside the greenhouse warms, the vent gradually opens to allow the correct amount of airflow into the greenhouse and closes when the optimal temperature is reached. The vent arm uses minerals that expand with heat to push a piston that raises the window when the air inside the greenhouse gets warm. Then it contracts as the air cools, and uses a spring to close.